Hi SunnyDay,
Can you pass me your email addy? Will forward the name and contact of the guide and car rental to you.
Basically, I contacted the guide recommended by Ling in this forum. Very nice chap, but too bad he was not available and we had a replacement guide.
Word of advice when you book a guide is tell them exactly how many days you need their services for. The mistake my friends and I made were that we told them our arrival and departure date and they assumed we will use their services for the entire trip. When we arrived and told them that we only wanted to use 3 days of their services (out of the 5 days in SR). They were not exactly pleased BUT they were very professional, they didn't take it out on us. They still carried on introducing the place, explaining and bringing us around, entertaining our queries.
For Angkor Night Market, it is located within the main city area, so you can just hitch a tuktuk to bring you there. If you want to walk, can be done also, I think its the same stretch as Dead Fish Restaurant.
For areas within the city, say central market, old market, you can do it on your own after you return from Angkor. Just hitch a tuktuk. They charge a fix price which is of cos, negotiable. Check with the hotel that you are staying with how much approx the tuktuk will charge for bringing you to the place you want to go. Another alternative is to just walk cos SR is pretty safe.
For areas which are way out, say, Kapal Spien, Banteay Sri (another temple in Angkor but very far out) you need to pay additional. You need not confirm your itinerary before you go. The guides are very accommodating. When you reach there, you tell them the specific areas you want to go and they will tell you the extra charges. You can then decide if you want to go.
For sunrise at Angkor, there are additional charges as well (but these charges can be shared with the group of friends you are traveling with) BUT need to wake up super the very the early, so we gave it a miss
The guide will only bring you around til abt 6pm plus to 7pm plus. Won't exactly take you around all the way into the night. My personal tour with them ends after we finish Angkor and they will just drive us back to the hotel.