FRx installation for AX

We are currently using GP and will implement AX 2009 soon.

My question is if it is possible to install FRx for both GP and AX in one client PC. We need both FRx to compare data while we are migrating GL balance from GP to AX.

I have tested and it seems that I could install both versions but only one of version for designer started even I ran from different exe file of FRx.

If anyone has any idea how to implement and run both FRx, please let me know.

Thank you,

Taka