Windows 9x Power Pack is a compilation of most major patches for Windows 98Gold/SE/Me and also includes IE6.0SP1 and DirectX 9.0c (June 2006 w/Managed DX).

Windows 9x Power Pack includes:

All Unofficial Service Packs for 98 Gold, SE, And Windows Me.
vMDGx's 98SE2Me

Tihiy's (re-release) RPLite v5, and instructions/zip for lameskin v6 preview.

7-Zip

Windows Media Player 9.0 + Codecs

MDGx's Windows Media Player 10.0 for Win98SE

Xeno86's Kernel Update Project v0.2.7

Maximus Decim's NUSB, NUSB Decorator patches

Maximus Decim's MDAC update package

Maximus Decim's IE6.0 components update for Win98SE

Microsoft XML Update

and much more

Patch to 4.1 is available here.