RAM compatibility PC2-4200/PC2-5300

Hello,
I have a laptop Acer Aspire 5102WLMi 2007 with Vista Home Premium Edition. I decided to 2GB of RAM to 4 GB (I have 64-bit Linux). I visited the some site and I noticed that all were compatible kits PC2-4200; But too late! I had already bought 2x2 GB PC2-5300 because I didn't knew PC2-4200 2GB
Is my PC is compatible with these kits?
Thank you for your response

hi,
normally consistent (I think they works). What is the manufacturer name of the ram that you bought?

These are of Kingston. Other opinions?
And if it works, the kits turns it into 667 Mhz or 533 Mhz? for which one , i should go for.

Choose as your current RAM speed : 533 Mhz