Within each standard (DDR1 in this case), speeds are backwards compatible. Also, the DIMM itself doesn't clock anything, the memory controller on the motherboard does.
So see a speed indication as the speed limit on a road: staying under the limit is always safe, going faster risks crashes. There's no problem at all with running slower.
What might be a problem though is the capacity/density of the SO-DIMM. The Evo N1020V has an ATi RS200M chipset. I'm having trouble finding clear specs for the chipset, but the laptop indicates a max memory of 1GB using both SO-DIMM slots. I strongly suspect that it can handle max 1Gb chips (note the lower-case b, this is bits not Bytes), which works out at max 512MB per SO-DIMM. If you want 1GB of RAM, you will thus need two 512MB SO-DIMMs rather than a single 1GB SO-DIMM.