Help to change TOS or DSCP ....

hi

i installed squid 2.7E16 on debian 4 etch .. with zph patch ..
this server is connected to mikrotik router os . which is the gateway of my network ..
everything is fine and working perfectly ..:p
i installed videocache helper for squid lately , to cache youtube and other 13 video sites ..
again everything is working perfectly ..:p

only one issue ::-(

the cached video files doesnt recognized by zph as a hit !! so its tos or dscp doesnt cheange by zph ..:!:
any other HIT files is marked like always ..

the videocache writer said that the squid doesnt allow the helper to interface r to zph !! so its not possible directly , there must be some ip-table rule to do rhis ..

the videocache files are coming from the Apache server in the same server ( stored thier ) so someone suggested to me that i have to mark these packets coming from apache port , i did it , its working only for the packets which is requested directly from apache like if i download a file from apache , but the cached video which is requested by a network user no , cause they are going from apache to squid then they will be output to mikrotik .. the tos or dscp mark will chabge ..

any idea to mark these packets ( changing thier tos or dscp ) and keep these changes even when its going to mikrotik through squid ?