Hi tommyp, HFSlip is awesome n I've been trying the old 1.7.9 beta m (6 June) n it's fantastic. I don't have to put the hotfixes in HFSVCPACK_SW1 anymore I've been modifying the old 1.7.9.m a bit to slipstream XAudio2 from DirectX 9 since [PROTOTYPE] needs it. I've tested it n it's been good so far. I thought it would be nice to include this bit of code which I stole from HFSlip 2.0 into your new version In :DX9EXTRA section on line 2121 I put IF EXIST HFCABS\*XAudio_x86.cab FOR /F %%I IN ('DIR/B/A-D/ON HFCABS\*XAudio_x86.cab') DO EXPAND HFCABS\%%I -F:* WORK\DX9EXTRA >NUL then on line 2155 I put IF EXIST WORK\DX9EXTRA\XAPOFX*.dll FOR /F "TOKENS=1,2 DELIMS=_" %%I IN ('DIR/B/ON/L WORK\DX9EXTRA\XAPOFX*.dll') DO ( REN "WORK\DX9EXTRA\%%I_%%J" %%I%%J ECHO>>SOURCESS\I386\TXTSETUP.SIF %%I%%J = 1,,,,,,,2,0,0,%%I_%%J&ECHO>>SOURCESS\I386\DOSNET.INF d1,%%I%%J ) IF EXIST WORK\DX9EXTRA\XAudio*.dll FOR /F "TOKENS=1,2* DELIMS=io" %%I IN ('DIR/B/ON WORK\DX9EXTRA\XAudio*.dll') DO ( REN "WORK\DX9EXTRA\%%Iio%%J" %%I%%J ECHO>>SOURCESS\I386\TXTSETUP.SIF %%I%%J = 1,,,,,,,2,0,0,%%Iio%%J&ECHO>>SOURCESS\I386\DOSNET.INF d1,%%I%%J ECHO>>WORK\RGSVRWU.TXT HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx\ZZB","!HFDX!",0,"%%11%%\regsvr32 /s """%%11%%\%%Iio%%J"""" SET /A HFDX=!HFDX!+1 ) I have Windows XP SP3 slipstream n will do another slipstream with ur beta in 2 days time n let u know how I go. P.S. is there such thing as XPSP3.EXT for HFCLEANUP? I've been using XPSP2.EXT n rename it as XPSP3.EXT... not too sure whether it actually does anything for me.