[what the use of mesh? it doesnt fit, you have to use alpha layers to make it fit???]

I agree on that :-) , i also keep my old non mesh avatar

but i have a question though, how can i enable hardware skinning? basic shadow is enable 

[how can i Enable hardware skinning? basic shadow is already enabled ?this is my system specs.]

Singularity Viewer 1.8.6 (6157) Feb 26 2015 23:47:22 (Singularity)
Release Notes

Grid: Second Life

Built with MSVC version 1600

You are at 197492.7, 279776.0, 501.2 in Lake Refuge (771, 1092) located at sim8941.agni.lindenlab.com (216.82.41.117:13025)
Second Life Server 15.07.28.303910
Release Notes

CPU: Intel(R) Core(TM)2 Duo CPU T7100 @ 1.80GHz (1794.96 MHz)
Memory: 2038 MB
OS Version: Microsoft Windows 7 32-bit Service Pack 1 (Build 7601)
Graphics Card Vendor: Intel
Graphics Card: Intel 965/963 Graphics Media Accelerator
Windows Graphics Driver Version: 8.14.0010.1930
OpenGL Version: 2.0.0 - Build 8.14.10.1930
RLV Version: RLV v2.8.0 / RLVa v1.4.10a

Viewer SSE Version: SSE2
libcurl Version: libcurl/7.21.1 OpenSSL/1.0.0g zlib/1.2.5 c-ares/1.7.1
J2C Decoder Version: OpenJPEG: 1.5.2
Audio Driver Version: FMOD Ex 4.44.50
Qt Webkit Version: 4.7.1 (version number hard-coded)
Packets Lost: 29/66220 (0.0%)