I would suggest that if you're making this beer for a party that you do something you're more familiar with. I'm assuming that you're looking for a beer with mass appeal and thus the request for a Pilsner. You likely won't make a great lager on your first try so I would suggest you make a blonde ale or a light pale ale. You have much more margin for error there. Keep the grain bill simple, hop conservatively and you'll be ok.
You could do a pilsner lager, but you *must* follow some basic guildelines or it won't turn out good (if you skip any of these you might as well just make an ale):
1. You need soft water (i recommend distilled plus a small amount of minerals). I'd recomend Bru'n'water's yellow balanced profile. There is some lee-way here but if you have alkaline water just use the distilled water (you're trying to impress a crowd remember). It really does make a difference.
2. Mash low (148-150) and mash long (60-90 minutes). I'd even suggest a step mash if you can, but it's not required. I like 130F(20min)->140(30)->150(20)->168(20). The step mash isn't as important as mashing low and mashing long.
3. Boil for 90 minutes if you have pilsner malt (obviously required for a Pilsner).
4. Absolutely do not pitch the beer warm. If you end up high on the temp use your temp control to bring it down, then aerate, then pitch. You need to pitch when the beer is 50 or lower (45-48 being your target). If you don't you'll have an ester bomb. Ferment at a temperature appropriate for the yeast. 50F is usually a safe number, but anything on the low end of the recommended range is going to give you a cleaner beer.
5. You MUST pitch more yeast than you'd ever consider for an ale. I've made a lot of lagers with a lot of different pitching rates and only those with ridiculous amounts of yeast had a clean flavor profile. If you do dry yeast you're looking at 2-3 packs, and for a liquid yeast, probably 4-5 unless you do a huge starter. My last batch I pitched 1 pack to 1.5L, let it run on a stir plate, then took that, and pitched it to 3L, and let that run on a stir plate. I pitched an estimated 600 BILLION cells to 5G (1.2 TRILLION to 10G). That's a lot of yeast.
6. Do the diacetyl rest when the kraussen drops. This will help reduce the butter flavor, AND will encourage the yeast to consume the last few gravity points.
7. You're really pushing your time limits here. Keep your gravity at 1.045-1.050 and get at least 4-5 weeks in cold storage.
Good luck!