Ok sorry, here is what I did, step by step:
First, you need a installation of MODx Evolution 1.0.2, from which you’ll copy the working TinyMCE.
1) Override assets\plugins\tinymce
2) Override manager\media\browser
3) Update configuration settings on "Elements > Manage Elements > Plugin > TinyMCE > Configuration Settings" on "Plugin configuration" with:
&customparams=Custom Parameters;textarea; &tinyFormats=Block Formats;text;p,h1,h2,h3,h4,h5,h6,div,blockquote,code,pre,address &entity_encoding=Entity Encoding;list;named,numeric,raw;named &entities=Entities;text; &tinyPathOptions=Path Options;list;rootrelative,docrelative,fullpathurl;docrelative &tinyCleanup=Cleanup;list;enabled,disabled;enabled &tinyResizing=Advanced Resizing;list;true,false;false &advimage_styles=Advanced Image Styles;text; &advlink_styles=Advanced Link Styles;text; &disabledButtons=Disabled Buttons;text; &tinyLinkList=Link List;list;enabled,disabled;enabled &webtheme=Web Theme;list;simple,advanced,editor,custom;advanced &webPlugins=Web Plugins;text;paste,style,advimage,advlink,searchreplace,print,contextmenu,paste,fullscreen,nonbreaking,xhtmlxtras,visualchars,media &webButtons1=Web Buttons 1;text;undo,redo,selectall,separator,pastetext,pasteword,separator,search,replace,separator,nonbreaking,hr,charmap,separator,image,link,unlink,anchor,media,separator,cleanup,removeformat,separator,fullscreen,print,code,help &webButtons2=Web Buttons 2;text;bold,italic,underline,strikethrough,sub,sup,separator,separator,blockquote,bullist,numlist,outdent,indent,separator,justifyleft,justifycenter,justifyright,justifyfull,separator,styleselect,formatselect,separator,styleprops &webButtons3=Web Buttons 3;text;pastetext,pasteword,selectall &webButtons4=Web Buttons 4;text; &webAlign=Web Toolbar Alignment;list;ltr,rtl;ltr
This is what I did. It should work. BTW I hope they will put the old TinyMCE in the next MODx Evolution version.