Hello

As Poland was opened to the work-market in Netherlands I was considering looking for a summer work (july - august) there.
What I'm thinking of is:
1. moving to NL with my friend and our girlfriends (4 people),
2. renting a small, possibly cheap, flat (the best would be 2 small rooms w/ bathroom & kitchen),
3. getting a seasonal job (for 1-2 months) for us.
As most of you live in Netherlands I'm hoping to get some useful information from you, like:
- where and how should I look for a flat (or rooms) and if should I do it earlier (before coming to NL),
- where's the best area to get a well paid seasonal work (and what kind of work is possible for us),
- what are our chances to find a job

(we don't know dutch, only english - quite well thought),
- what will we need to apply there (what are required documents for a seasonal job?).
Hope you can help me somehow, thanks in advance.