Some info on the dmflags. 
// dmflags -- flags that can be set in the dmflags variable.
// DF_NO_HEALTH 
1
// DF_NO_POWERUPS 
2
// DF_WEAPONS_STAY 4
// DF_NO_FALLING 
8
// DF_INSTANT_ITEMS 
16
// DF_SAME_LEVEL 
32
// DF_NO_ARMOR 
2048
// DF_INFINITE_AMMO 
16384
// DF_NO_FOOTSTEPS 
131072
// DF_ALLOW_LEAN 
262144
// DF_OLD_SNIPERRIFLE 
524288
// DF_GERMAN_SHOTGUN 
1048576set dmflags (sum of all flags)
I have been told. That some flags do not work and others may be added in future patches. To combined flags, simply add the numbers together. 
Example: You want to set DF_ALLOW_LEAN 
262144 and DF_OLD_SNIPERRIFLE 
524288
You would add 
262144 + 524288 = 786432 
simply add the following line to your server.cfg file 
set dmflags 
786432
You can also link to this guide on MOHadmin.com
http://mohadmin.com/nuke/modules.php?na ... cle&sid=32