Ahhh yes
The installer grabs your reg key
D:\Games\Steam\SteamApps\myemailaddress\half-life
Since you clicked the dod button.
The installer strips the "half-life" and adds "day of defeat"
But i don't know the full path.
that's the only combination in which i edit the install paths.
All other combo's are just copy pasted from your registery
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edit
That's hard to do with clickteam installer.
I coded it in.