How come if i get a short ram intake, they only have 2 sensor holes, one for a vacuum and one for the MAF sensor... and on my friends car it has 3, like 1 more vacuum hose, so if he gets something like this

http://cgi.ebay.com/ebaymotors/90-99-CELIC...sspagenameZWDVW

will he have to drill a new hole or just plug that one vacuum hose?

Since this is a 6th gen Celica specific site I'm assuming that's what you have.
Which means you don't have a MAF.
All you need on your intake is a hole for the air intake temp sensor and a vacuum port for your PCV system [breather].

As for what his engine needs, it would help if we knew what car and engine your friend had, all engines aren't the same...

oh, its a 98 celica gt, 5sfe engine. convertable... dunno if that matters. so what do we do with this 2nd vacuum hose? just block it off?

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i left it floating about when i intalled my intake

X_X

i wouldn't leave it floating about. you don't want any dirt particles getting sucked in through there.