Changing a texture ingame (Texture_Toggle?)
I'll hold you to that Chicken 
I must say, this forum is so much more easy going than the usual tech related forums out there on the web.. usually going off topic or asking two questions in one thread will be punished my the angry moderators, and newbies are treated like paria's...
Anyway, I am sticking with Chickens awesome 
timer. Maybe in the future I will take it apart to see how the internals all work [edited 28/09/12]
Cheers!
OK, I managed to make a couple of timers using the idea I mentioned above (go changing the textureindex of the .vtf overlay file with the numbers). I think it's pretty simple and the .vmf is really clear...
Check it HERE if you're interested. I hope it's useful 
useful tools and stuff here on TWP 
[spoiler]
[/spoiler]Thank you josepezdj, I've downloaded the file but not looked at it; not had much chance to mod during the weekend, but I did get my custom made flip-up panel working all by myself (and with help from a youtube tutorial). The major problem now is; I forgot what I had in mind as the final puzzle element! so I am now back at sorting that out. When done I will revisit the looks of my map and hopeful implement a nice timer
thx for the help!