Some HL2 Modding forums

3DBuzz HL2 forum
- this one looks like a superb modding resource. Broken down into 6 sub-forums on each aspect (eg texturing, modeling etc.) Whoah a lot on level creations etc.
CHECK this out, a sticky list of tutes and VTMs. A lot of "hammer" stuff, these guys are dorks like you Skaffen.

Often with these forums the best way to make use of them is as soon as you have a question get in and ask, it gets you established as a known member, people are more forthcoming later with help, and people see traffic there which promotes more visits. Some 3DBuzz forums are too quiet to be useful (I rarely visit their LW or Motionbuilder forums anymore) but I have a sneaking suspicion there might be more action in the modding ones.)

R&L HL2 forum
- Resistance and Liberation - WWII infantry simulation HL2 mod
Dunno how much use this is, found it thru a link, the LW->HL2 script author posted them there also. Could be a good place to find nerds who can answer questions. That kind of shit will be invaluable - ask a nerd and save yourself a week of swearing at your PC.