Telephone wiring

[Lisa Rodriguez]

hey, Ogre under my sister's name again.

Question about telephone wiring. I have done some minor research about how to put in a phone jack. My biggest problem is that our house has like 10 wires, a blue and white with blue stripes, red and white with red stripes, brown and white with brown stripes, grey and white with grey stripes, and green and white with green stripes. The phone line, i'm pretty sure, uses the blue and white with blue stripes. I took apart a working line and thats what it used, but when i hooked up my own, the whole line went dead.
On the current jack, the blue goes to two wires and the striped goes to two wires. I know it matters what wires they go to, but of the two that each uses, does it matter which end goes to where.
If thats hard to understand then try this:
currently
Blue wire == red wire
Blue wire == black wire
Striped wire == yellow wire
striped wire == green wire

would it matter if went like this.
Blue wire == black wire
Blue wire == red wire
Striped wire == green wire
striped wire == yellow wire


also, can the other wires, assuming they're not in use, be used as Cat5 wires, or are they not fast enough?

Any info you have would be great, thanks.