Noob: Can I edit Valve's props?

[Yojimbo]

Hi,

I'm creating a train yard in the level I'm working on, but none of the railway track props are quite the right size, so I've downloaded the XSI mod tool and GCFScrape, and was hoping to edit some of the props to better fit my map, but I haven't a clue how to do it.

Can anyone help??

Thanks

[hamst3r]

Actaually there is a way to re-scale and re-skin a model without even opening a model editor. I had to do something along these lines for a map i was working on. I followed these tuts:

Re-scaling

http://forum.interlopers.net/viewtopic.php?t=2509

Re-skining

http://forum.interlopers.net/viewtopic.php?t=7557

[Yojimbo]

Excellent, thanks for your help.