Just a follow-up on one of my previous posts, though it's going off the main topic again.
The mIRC installer looks up the value for the HKLM\SOFTWARE\Mircosoft\Windows|CurrentVersion\Unistall\mIRC\UninstallString key. If this key is preset, it will grab the path info from there, then check to see if that path exists. If it does, it uses this as the defaul install directory, otherwise it defaults to C:\Program Files\mirc
