I currently have released an early early version of my first ever HL1 MP map and well I am still learning much with Hammer but most that have seen it like it...I am currently amping up the map so as to have it be larger and I am adding a section where you can get more powerful weapons like explosions and what not but the problem is in that section you will have to try harder to reach those weapons...so yea...
I will post more about it when I get closer to being done with it. & when I am done with it I will post link to it here.
---Stixsmaster
P.S. I posted about the early version here: http://forums.steampowered.com/forums/showthread.php?t=629699