single-sided double-sided?

i have an old slot-1 ex motherboard and a few sticks of ram that won't work cause they are only single-sided.

i am using 2x32 pc66's (double-sided)

i have spare (single-sided)

1 x pc-133 64mb and
1 x pc-100 64mb

how can i get these to work on my motherboard?
i will take the old one's out and put the new one's in if they work,
any help plz guys (& girls)