Open Darwin ? shared /usr & /var/tmp - /portage ?

[n2kra]

Oops! didn't see this forum when I posted this.

has anyone figured how to open a .dmg in OpenDarwin ?

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and which filesystem is best to share /usr & /var/tmp - /portage
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[n2kra]

In the interest of saving disk space -
I noticed that open darwin seems to FAT (ppc/x86) install it's RPMs.

(In OS 8/9 (7?) FAT was m68k/PPC)

Until I figure how to rip/modify/re-burn the install image for a FAT / this ARCH option -
There are slim(ing) tools.