I can't answer that for two reasons. First (and most importantly) you haven't told anyone exactly what it is you're trying to accomplish. Second, as I said before, I don't use subscriptions so I'm the wrong person to ask.
FYI, the manual is at vBulletin Manual which should explain subscriptions.
PS Borbole has been known to write mods on a whim. You've got him halfway there, but again since nobody else is asking for this I don't think you'll get him to do it. I still think everyone else does it with subscriptions.
First of all, I dont have php or vb coding knowledge (but i'm self learning it so that i dont have to ask for things i want to do). So, you can say that I have a little php and vb knowledge.
Secondly, I will explain what exactly I'm trying to accomplish.
I dont know if seeing that hack made it clear that what i want. I hope it make clear otherwise I will try to explain in another way. Actually English is not my native language, so i'm not very good in it .