Please find BANGLA 'AhanLipi-Bangla14' FONT & KEYBOARD here. 
 
Pl. Install the font & Key Board and write Bangla in 
Unicode Open type UI((Unnumbered Information Frame) font. 
  
THIS SOFTWARE IS DISTRIBUTED FREE OF COST. 
ANYBODY CAN COPY IT, BUT NO BODY 
CAN CHANGE, ALTER OR REFORM IT IN ANY WAY. 
DISCLAIMER OF WARRANTY:-- THE SOFTWARE IS 'AS-IS'.
YOU BEAR THE RISK OF USING IT. SOFTWARE creator 
GIVES NO WARRANTIES, GUARANTEES OR CONDITIONS. 
SOFTWARE creator EXCLUDES THE IMPLIED WARRANTIES 
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
PURPOSE AND NON-INFRINGEMENT. No compensation or 
charges can be recovered from the software creator for any 
damage or loss or consequences arising out of this software. 
IT IS DEVELOPED UNDER WINDOWS7 ENVIRONMENT. 
SUGGESTIONS ARE CORDIALLY INVITED PL. 
==========================================
PART-1

for Windows7 --

If you are having Windows7 operating system then,
open the font package folder and drag & drop 
"AhanLipi-Bangla14" font to your windows font folder,
and then run 'Setup' by clicking it, to activate
"Bangla" keyboard. You will find 'EN' and 'BN'
at the bottom right corner. This is toggle switch. 
By clicking on 'BN' Bangla keyboard will be activated. 
Read "AhanLipi-Bangla14 BIBARAN" file and start writing Bangla. 
Bangla keyboard will be available in the font package 
folder.
Hope you will be able to write Bangla in Unicode font. 

========
Part-2

If the above process does not work then try the below --

Your computer should be Unicode compatible to work with
complex script as Bangla is complex script.
Required--
Original (1)Windows7 --Operating System, (2)MS Office Word 
Document, (3)Microsoft .NET, (4)Service Pack2 or 3 
Last two items are downloadable from net through proper
arrangement. 

Process: 
Open 'AhanLipi-Bangla14' folder for 'AhanLipi-Bangla14' font. Drag & Drop 
'AhanLipi-Bangla14' font to Windows fonts folder & then Run 
setup(140KB Application). 
Process--
1)Start--Settings--Control Panel-- Regional and Language
Options(Customize settings for the display of languages, 
numbers, times, and dates)--Languages --[Tick Box]Install 
files for complex script and right-to-left languages (including
Thai). 
This will install required languages, you may require 
Original Windows installation CD. 
Tick on Details box. Set Bengali(India)-Bn14 Description. 
Tick on Language Bar. Tick on first(Show the Language bar 
on the desktop)& third(Show additional Language bar icons
in the taskbar)[(& 4th-- Show labels on the Language 
bar)]item--Ok. 
next Apply-Ok. 
next Apply--Ok. 
In Advanced option you will see 57003(ISCII)-Bengali is 
already ticked in the box. 
You can change the short date setting by clicking Regional
Options - Customize[English(United Kingdom)], and then
location India. [ short date will be 30/09/2011, not like 
US short date 09/30/2011, but time will be in the format
16.53]. You may choose any one of the format you like. 
Apply-- OK.  

Right-click on Task bar at the bottom right-> Toolbars-> tick 
Language bar.
Now it is ready, you will see Options on the task bar, 
BN(Bengali) & EN(English). Tick BN for Bangla or 
EN for English as and when required, or press alt+shift 
for toggling. 
Settings... menu will be shown in the taskbar 
to modify settings next. 
 
