its fixed now...Kusfield and i went with this adventure, with many combinations of bits, and finally came to solution, when you have more entities:
PHP Code:
//on players spawn:
set_pev( id, pev_groupinfo, 0xFFFFFFFF )
//when creating entity:
set_pev( ent, pev_groupinfo, 1<<current_ent )
//g_ent[ current_ent++ ] blabla
//set solid_not to that one entity for player1: Must be reversed bit than the entity's
set_pev( id, pev_groupinfo, ~(1<<CURRENT_ENT_BIT) )
//to make it solid again for player1:
set_pev( id, pev_groupinfo, 0xFFFFFFFF )