Install the usb nic Driver in RHEL5

Install the usb nic Driver Under RHEL5-general Linux technology-Linux technology and application information. For more information, see the following. I installed the USB wireless NIC Driver of Xuan wing under RHEL5. After the USB Nic is connected, no prompt is displayed on the computer. Then I installed the driver with instructions:
Release Date:, ver 1.2
RTL8187 Linux driver version 1.2

-- This driver supports RealTek RTL8187 Wireless LAN driver
Fedora Core 2/3/4/5, Debian 3.1, Mandrake 10.2/Mandriva 2006,
SUSE 9.3/10.1/10.2, Gentoo 3.1, etc.
-Support Client mode for either infrastructure or adhoc mode
-Support WEP and WPAPSK connection

<Component>
The driver is composed of several parts:
1. Module source code
Stack.tar.gz
Drv.tar.gz

2. Script ot build the modules
Makedrv

3. Script to load/unload modules
Wlan0up
Wlan0down

4. Script and configuration for DHCP
Wlan0dhcp
Ifcfg-wlan0
4. Supplicant source code:
Wpa_supplicant-0.4.9.tar.gz

5. Example of supplicant configuration file:
Wpa1.conf

<Installation>
Runing the scripts can finish all operations of building up modules
From the source code and start the nic.
1. Build up the drivers from the source code
./Makedrv

2. load the driver module to kernel and start up nic
./Wlan0up
(This is part of the description above) the following error occurs when I execute./makedrv:
Rm-rf/mnt/ieee80211/tmp
Make-C/lib/modules/2.6.18-8. e15xen/build M =/mnt/ieee80211 modules
Make: ***/lib/modules/2.6.18-8. e15xen/build: the file or directory does not exist. Stop
Make: *** [modules] Error 2
Rm-f *. mod. c *. mod *. o. *. cmd *. ko *~
Rm-rf/mnt/rt18187/tmp
Make-C/lib/modules/2.6.18-8. e15xen/build M =/mnt/rt18187 modules
Make: ***/lib/modules/2.6.18-8. e15xen/build: the file or directory does not exist. Stop
Make: *** [modules] Error 2

I found the file according to the prompt. build is an uneditable file,
How can I solve this problem? How can I use my wireless network card ??? Expert advice