hard drive upgrade question

[TouchNGo]

hey all

i need a bit of help here, still a bit of a mac n00b. i have a 60gb Seagate hard drive that i used to have in an old win 95 box which is still a pc formatted drive with lots of files that i dont really want anymore. if i were to put this drive straight into my 500mhz indigo imac in place of the 20gb that is there, would it automatically prompt me to format the drive for mac or will something sinister happen?

[Macman]

it wont auto reformat it, but if you can hook it up to another mac, you can reformat it that way. it may work if you connect it and it lets you put in the os x install disc 1 and
then you can boot from that and do a clean install.