It took me a couple of tries to get everything installed, but I think it's finally working. Here's what I did:

T-013-MM-SP-001-K1, , Rev. 1.4C, 0.13 UM RF 1P8M SALICIDE 1.2V/2.5V/3.3V 1P8M FSG PDK [31-JAN-2012; 134M bytes]
T-013-MM-SP-001-K2, Rev. 1.4C_3, 0.13 UM RF 1P8M SALICIDE 1.2V/2.5V/3.3V 1P8M FSG PDK PATCH (CR013G)
T-013-MM-SP-001-K3, Rev. 1.4C, 0.13 UM RF 1P8M SALICIDE 1.2V/2.5V/3.3V 1P8M FSG PDK (CR013G)(CADENCE OA6.1 VERSION) [16-FEB-2012; 647M bytes]
T-013-MM-SP-001-K4, Rev. 1.4C_3, 0.13 UM RF 1P8M SALICIDE 1.2V/2.5V/3.3V 1P8M FSG PDK PATCH (CR013G)(CADENCE OA6.1 VERSION) [26-DEC-2012; 4754k bytes]

I downloaded the above zip files from the website. Turns out since we're using OA6.1, I only needed the K3 and K4 files.

K3

[0.13_micron_mixed_signal]$ cd T-013-MM-SP-001-K3/
[T-013-MM-SP-001-K3]$ tar xzf tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K3_v1.4c_IC61_20120217_all.tar.gz 
[T-013-MM-SP-001-K3]$ tar xzf tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K3_v1.4c_IC61_20120217.tar.gz
[T-013-MM-SP-001-K3]$ ./pdkInstall.pl 
match library name:tsmc13
Total Case Selection:3
*Avaliable types of PROC are: 
   1 - 0.13um MS/RF 1.2v/2.5v
   2 - 0.13um MS/RF 1.2v/3.3v
Please enter your choice: (1,2...)
1,2
Argument "1,2" isn't numeric in int at ./pdkInstall.pl line 1159,  line 1.


*Avaliable types of MIMCAP are: 
   1 - 1.0fF_MIM
   2 - 1.5fF_MIM
Please enter your choice: (1,2...)
1,2
Argument "1,2" isn't numeric in int at ./pdkInstall.pl line 1159,  line 2.


*Avaliable types of METAL are: 
   1 - 1p8m_5X1Z1U_CURDL
   2 - 1p8m_6X1Z0U_CURDL
   3 - 1p7m_4X1Z1U_CURDL
   4 - 1p7m_5X1Z0U_CURDL
   5 - 1p6m_3X1Z1U_CURDL
   6 - 1p6m_4X1Z0U_CURDL
   7 - 1p5m_2X1Z1U_CURDL
   8 - 1p5m_3X1Z0U_CURDL
   9 - 1p4m_1X1Z1U_CURDL
   10 - 1p4m_2X1Z0U_CURDL
Please enter your choice: (1,2...)
1,2,3,4,5,6,7,8,9,10
Argument "1,2,3,4,5,6,7,8,9,10" isn't numeric in int at ./pdkInstall.pl line 1159,  line 3.


Please enter your Installation Directory Name: 
PDK
Please confirm with your selection : 
*********************************************************
*** Select PROC : 0.13um MS/RF 1.2v/2.5v
*** Select MIMCAP : 1.0fF_MIM
*** Select METAL : 1p8m_5X1Z1U_CURDL
*** Install to directory : PDK
*********************************************************
Are these correct (y|n) ?
y
mv: cannot stat `current_process.txt': No such file or directory
====== Copying Lib files ======
Complete 
====== Installing pdk library ======
Running "rm -rf tsmc13rf/M1_NACTIVE" ......
Running "rm -rf tsmc13rf/M1_NPOLYG" ......
Running "rm -rf tsmc13rf/M1_NWELL" ......
Running "rm -rf tsmc13rf/M1_OD" ......
Running "rm -rf tsmc13rf/M1_ODc" ......
Running "rm -rf tsmc13rf/M1_PACTIVE" ......
.
.
.
Running "cp -rf ../Raw_data/tsmc13rf/rm6n tsmc13rf/rm6" ......
Running "cp -rf ../Raw_data/tsmc13rf/rm5n tsmc13rf/rm5" ......
Running "cp -rf ../Raw_data/tsmc13rf/rm4n tsmc13rf/rm4" ......
Running "cp -rf ../Raw_data/tsmc13rf/rm3n tsmc13rf/rm3" ......
Found "/net/sw/mosis/TSMC/0.13_micron_mixed_signal/T-013-MM-SP-001-K3/PDK/models/hspice/temp.mdl"
Generating "/net/sw/mosis/TSMC/0.13_micron_mixed_signal/T-013-MM-SP-001-K3/PDK/models/hspice/hspice.mdl" .....
*Info: PDK installation completed.

That finished the K3 install. Now I just needed to install the K4 patch.

K4

[tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K4_v1.4c_Patch3_20121221_all]$ mv tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K4_v1.4c_Patch3_20121221 ../../T-013-MM-SP-001-K3/PDK/
[tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K4_v1.4c_Patch3_20121221_all]$ cd ../T-013-MM-SP-001-K3/PDK
[PDK]$ cd tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K4_v1.4c_Patch3_20121221/
[tsmc13rf_FSG_12v_25v_33v_T-013-MM-SP-001-K4_v1.4c_Patch3_20121221]$ ./pdkPatchInstall.pl 
Install the V1.4c_3  into "../tsmc13rf"(y/n)?y
PDK patch installation complete.