Accessing from aspnet_Profile table based on condition

Hello,
I am stuck here how to pull the values from Profile table by passing userid.
I am saving FirstName,Lastname,Address etc.. in aspnet_profile table.
data for one column(propertyvaluesstring) is 20705Nobeltsvillerajesh3906 tttton blvd apt#158166123382SaintsPot22ru8166123482kd<?xml version="1.0" encoding="utf-16"?>
<dateTime>1985-11-16T00:00:00</dateTime>Colts
If there are 100 users there are 100 rows in Profiles table storing the strings similar to ablove.
I know we can get the values like this Profile.FirstName.ToString().But I need values for some particular users.

My question is how can i access all these fields by passing userid.Let me know if you have any questions.

Please suggest me.

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