Ghost Recon Desert Siege install pb

[PAC007]

I need help for installing Ghost Recon Desert Siege.

I have Ghost Recon on my HD, however I got it unpacked with the ghostrecon.exe already cracked (NOCD). Therefore I didn't run any setup th have Ghost Recon playable.

Now I have an ISO of Desert Siege and to install it I have to run a setup that search for Ghost Recon on my HD and does not find it.

I suppose that it must search through registry database and/or other files before starting the install. I am pretty sure that there is a way to trick the setup.

Thanks for helping.