yes!! ideal are excellent.
if you hav a look at Suzannes workshops she does the square card demo in there.
i think the 8inch one goes like this,
2XA4 sheets.
take yer A4 card and score along the trifold line, then use the second and stick to the small bit you scored, turn it over and cut off the overhang.

basic instruction, but i thought you maight be in a hurry, the 6x6 one should be same instructions but score your card at the 6inch mark.

hope this helps,
chell
x

ps. the workshop demo is more detailed.