Before I begin I must say I am running Win XP Pro SP1

I suspect that I may be infected with a stealthy malware of some kind and need some expert opinions. Recently I had cleaned my system of some malware that hijacked my dns and browser. I was unable to idenify the virus but assumed the infection was gone since hijackthis log apeared clean.

Firstly I downloaded and ran RootkitRevealer from SysInternals with following results:

HKLM\S-1-5-21-73586283-1935655697-839522115-1003\Software\Microsoft\Windows\CurrentVersion\Explorer\UserAssist\{75048700-EF1F-11D0-9888-006097DEACF9}\Count\HRZR_EHACNGU:P:\Qbphzragf naq Frggvatf\fcbfrf\Zl Qbphzragf\Qbjaybnqf\(cp tnzr) Lrgvfcbeg Cneg 1-6 B 2/19/2006 10:41 PM 16 bytes Hidden from Windows API.
HKLM\SOFTWARE\Classes\Installer\Products\32418F9EE1126B64A90E8365B85CFCF6\ProductName 12/14/2005 4:52 PM 58 bytes Data mismatch between Windows API and raw hive data.
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{E9F81423-211E-46B6-9AE0-38568BC5CF6F}\DisplayName 12/14/2005 4:59 PM 58 bytes Data mismatch between Windows API and raw hive data.
HKLM\SYSTEM\ControlSet001\Services\sptd\Cfg\s0 12/14/2005 5:28 PM 4 bytes Hidden from Windows API.
HKLM\SYSTEM\ControlSet001\Services\sptd\Cfg\s1 12/14/2005 5:28 PM 4 bytes Hidden from Windows API.
HKLM\SYSTEM\ControlSet001\Services\sptd\Cfg\s2 12/14/2005 5:28 PM 4 bytes Hidden from Windows API.
HKLM\SYSTEM\ControlSet001\Services\sptd\Cfg\g0 12/14/2005 5:28 PM 32 bytes Hidden from Windows API.
HKLM\SYSTEM\ControlSet001\Services\sptd\Cfg\h0 12/14/2005 5:28 PM 4 bytes Hidden from Windows API.
HKLM\SYSTEM\ControlSet001\Services\sptd\Cfg\19659239224E364682FA4BAF72C53EA4 2/11/2006 1:03 AM 0 bytes Hidden from Windows API.
Secondly Inside Documents and settings I notice a hidden folder NetworkService

In the previous few days after discovering a malware infection I made several key changes to my system:

I started using fireFox rather then Avant Browser (Internet Explorer)
I uninstalled MS Java and replaced it with the real Sun Java
I downloaded BufferZone for firefox (Some sort of sandbox protection)
I used a free tool BugOff from the creator of HijackThis and with it, disabled several InternetExplorer weaknesses
I updated SpywareBlaster, SpywareGuard and did both an adaware and spybot scan.
I scaned my system with ewido security suite.
I did an antivirus scan.

I have provided HijackThis logs attached. Please could anyone tell me weather there is potential rootkit or malware infection.